1 /* 2 * Copyright (c) 2009 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 /* 35 * NFSIOD operations - now built into the kernel. 36 */ 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/kernel.h> 43 #include <sys/mbuf.h> 44 #include <sys/vnode.h> 45 #include <sys/fcntl.h> 46 #include <sys/protosw.h> 47 #include <sys/resourcevar.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/socketops.h> 51 #include <sys/syslog.h> 52 #include <sys/thread.h> 53 #include <sys/tprintf.h> 54 #include <sys/sysctl.h> 55 #include <sys/signalvar.h> 56 #include <sys/mutex.h> 57 58 #include <sys/signal2.h> 59 #include <sys/mutex2.h> 60 61 #include <netinet/in.h> 62 #include <netinet/tcp.h> 63 #include <sys/thread2.h> 64 65 #include "rpcv2.h" 66 #include "nfsproto.h" 67 #include "nfs.h" 68 #include "xdr_subs.h" 69 #include "nfsm_subs.h" 70 #include "nfsmount.h" 71 #include "nfsnode.h" 72 #include "nfsrtt.h" 73 74 void 75 nfssvc_iod_reader(void *arg) 76 { 77 struct nfsmount *nmp = arg; 78 79 if (nmp->nm_rxstate == NFSSVC_INIT) 80 nmp->nm_rxstate = NFSSVC_PENDING; 81 for (;;) { 82 if (nmp->nm_rxstate == NFSSVC_WAITING) { 83 tsleep(&nmp->nm_rxstate, 0, "nfsidl", 0); 84 continue; 85 } 86 if (nmp->nm_rxstate != NFSSVC_PENDING) 87 break; 88 nmp->nm_rxstate = NFSSVC_WAITING; 89 90 #if 0 91 error = tsleep((caddr_t)&nfs_iodwant[myiod], 92 PCATCH, "nfsidl", 0); 93 #endif 94 } 95 nmp->nm_rxthread = NULL; 96 nmp->nm_rxstate = NFSSVC_DONE; 97 wakeup(&nmp->nm_rxthread); 98 } 99 100 /* 101 * The writer sits on the send side of the client's socket and 102 * does both the initial processing of BIOs and also transmission 103 * and retransmission of nfsreq's. 104 */ 105 void 106 nfssvc_iod_writer(void *arg) 107 { 108 struct nfsmount *nmp = arg; 109 struct bio *bio; 110 struct vnode *vp; 111 112 if (nmp->nm_txstate == NFSSVC_INIT) 113 nmp->nm_txstate = NFSSVC_PENDING; 114 for (;;) { 115 if (nmp->nm_txstate == NFSSVC_WAITING) { 116 tsleep(&nmp->nm_txstate, 0, "nfsidl", 0); 117 continue; 118 } 119 if (nmp->nm_txstate != NFSSVC_PENDING) 120 break; 121 nmp->nm_txstate = NFSSVC_WAITING; 122 123 while (nmp->nm_bioqlen && nmp->nm_reqqlen < 32) { 124 bio = TAILQ_FIRST(&nmp->nm_bioq); 125 KKASSERT(bio); 126 TAILQ_REMOVE(&nmp->nm_bioq, bio, bio_act); 127 nmp->nm_bioqlen--; 128 vp = bio->bio_driver_info; 129 nfs_doio(vp, bio, NULL); 130 } 131 } 132 nmp->nm_txthread = NULL; 133 nmp->nm_txstate = NFSSVC_DONE; 134 wakeup(&nmp->nm_txthread); 135 } 136 137 void 138 nfssvc_iod_stop(struct nfsmount *nmp) 139 { 140 nmp->nm_txstate = NFSSVC_STOPPING; 141 wakeup(&nmp->nm_txstate); 142 while (nmp->nm_txthread) 143 tsleep(&nmp->nm_txthread, 0, "nfssttx", 0); 144 145 nmp->nm_rxstate = NFSSVC_STOPPING; 146 wakeup(&nmp->nm_rxstate); 147 while (nmp->nm_rxthread) 148 tsleep(&nmp->nm_rxthread, 0, "nfsstrx", 0); 149 } 150 151 void 152 nfssvc_iod_writer_wakeup(struct nfsmount *nmp) 153 { 154 if (nmp->nm_txstate == NFSSVC_WAITING) { 155 nmp->nm_txstate = NFSSVC_PENDING; 156 wakeup(&nmp->nm_txstate); 157 } 158 } 159